Staff / Principal Platform Engineer

AppGate Cybersecurity, Inc.; New York (NY); Hybrid; USD 185,000 - 270,000; Full time

Job summary

AppGate Cybersecurity, Inc. in New York City is seeking a Staff or Principal Platform Engineer to build and operate the foundational AI platform behind our security products.

You will own cloud infrastructure, self-managed services and AI/ML infrastructure, ensuring fast, reliable, observable systems at scale. In this highly hands-on leadership role, you will set technical direction, mentor engineers and implement IaC, CI/CD and SRE practices while collaborating with data scientists and product

Qualifications

• Extensive platform, infra or SRE experience, 8+ years for staff or 12+ years for principal with impact.
• Strong IaC, CI/CD, containers and cloud proficiency across AWS and Kubernetes.
• Hands-on observability across APIs and systems with Prometheus, Grafana and OpenTelemetry.
• Experience with real-time and batch data ingestion pipelines and data quality.
• Fluency in Python or Go with automation-first engineering craft.
• Leadership record: setting direction, mentoring seniors, while remaining hands-on.
• Pragmatic, ownership-driven mindset in a fast-moving environment.

Responsibilities

• Design, build and operate cloud infrastructure and pipelines for AI/cloud products.
• Implement IaC and deployment orchestration with Terraform and Helm.
• Instrument APIs and services for observability; define SLOs and health metrics.
• Develop real-time and batch data ingestion pipelines and feature stores.
• Integrate third-party connectors and platform APIs with reliability in mind.
• Operationalize AI/ML: model serving, inference pipelines and MLOps tooling.
• Apply SRE practices to reduce toil and improve platform resilience.
• Set technical direction and mentor engineers while shipping high-impact work.
• Collaborate with data scientists, product teams and leadership to align investments.

Skills

DevOps

IaC

CI/CD

Cloud platforms

Observability

Backend language (Python/Go)

Leadership

Ownership mindset

Tools

Terraform

Helm

Docker

Kubernetes

AWS

Prometheus

Grafana

OpenTelemetry

ELK stack

SLO tracking

Job description

Staff / Principal Platform Engineer

Location: New York City | Hybrid
Department: AI Platform & Infrastructure Team
Reports to: Vangie Shue - Principal Engineering Manager

About AppGate

AppGate secures and protects an organization’s most valuable assets with its high performance Zero Trust Network Access (ZTNA) solution and Cyber Advisory Services. AppGate ZTNA is the only direct-routed Zero Trust solution built for peak performance, superior protection and seamless interoperability. AppGate Cyber Advisory Services harden your security posture and ensure business continuity. AppGate safeguards Fortune 500 enterprises and government agencies worldwide. Learn more at appgate.com.

About the Role

As we expand our platform, we are standing up a new AI Platform & Infrastructure team: the engine room of AppGate’s AI strategy. This team owns the infrastructure layer that every next-generation security capability is built on, from network observability to AI-driven threat detection and the secure operation of emerging Agentic AI systems.

We’re looking for a Staff or Principal Platform Engineer to build and operate the foundational platform behind AppGate’s AI products. You combine deep DevOps and cloud infrastructure expertise with hands‑on experience operationalizing AI/ML systems, and you treat observability as a first‑class engineering discipline. This is a rare opportunity to join a small, private, high-impact company where your work directly shapes the architecture, reliability and core platform that defines the future of security.

You’ll own the platform spanning APIs, cloud and self‑managed solutions and AI/ML infrastructure, and you’ll make it fast, reliable and observable at scale. This is a high‑leverage, hands‑on role for a senior engineer who sets technical direction and still ships.

Key Responsibilities

• Build the Platform: design, build and operate the cloud infrastructure, services and pipelines that AppGate’s AI and cloud products run on. Strong experience with self‑managed technologies (kafka, elasticsearch) and Kubernetes are a must.
• Infrastructure as Code & Deployment Orchestration: Terraform and Helm for cloud provisioning, service deployment and configuration management.
• Implement Observability: instrument APIs, cloud services and AI/ML infrastructure with metrics, logging, tracing and alerting, and define SLOs and operational health metrics that teams trust.
• Data Platform: real‑time and batch data ingestion pipelines, feature stores and data quality.
• Integrations: third‑party connectors, APIs and platform integrations.
• Operationalize AI/ML: build model serving and inference pipelines, experiment tracking and the MLOps tooling for deployment, versioning, drift monitoring and lifecycle management.
• Engineer for reliability & automation: apply SRE practices to reduce toil, improve resilience and keep latency and uptime within target across the platform. Automate everything - deliver infrastructure‑as‑code, CI/CD and self‑service tooling so product teams ship safely and quickly.
• Set technical direction: define platform standards, architecture and best practices, and raise the engineering bar through design reviews and mentorship.
• Collaborate cross‑functionally: partner with data scientists, product teams and leadership to align platform investment with AppGate’s strategic vision.

Required Qualifications

• Experience: extensive platform, infrastructure or SRE engineering experience, with a track record of operating production systems at scale. Staff-level candidates typically bring 8+ years and Principal-level candidates 12+ years, though we hire on demonstrated impact.
• DevOps depth: strong command of infrastructure‑as‑code (Terraform or equivalent), CI/CD, containers and orchestration (Docker, Kubernetes), and cloud platforms (AWS).
• Observability expertise: hands‑on experience implementing observability across APIs, cloud services and distributed systems using tools such as Prometheus, Grafana, OpenTelemetry, the ELK stack or comparable, including SLO and error‑budget practice.
• Data platform skills: familiarity with real‑time and batch ingestion pipelines, feature stores and data quality at production scale.
• Engineering craft: fluency in a primary backend language (Python, Go or similar) and a strong bias toward automation, testing and reliable, maintainable systems.
• Leadership: a record of setting technical direction, leading complex initiatives across teams, mentoring senior engineers, while still being very hands‑on.
• Mindset: pragmatic, rigorous and ownership-driven. You thrive in a small, fast‑moving environment and enjoy building foundations others depend on.

Preferred Qualifications

• AI/ML infrastructure: experience building or operating model serving, inference pipelines and MLOps tooling such as MLflow, Kubeflow, SageMaker or equivalent, including model deployment, versioning and drift monitoring.
• Networking & Zero Trust fundamentals: working knowledge of the network and routing layer beneath modern access solutions — TCP/IP, TLS, tunneling/overlay networks, packet routing and filtering, DNS and firewalling — and familiarity with Zero Trust Network Access (ZTNA) or adjacent domains (VPN, SDP, SASE, software‑defined networking). You can reason about traffic paths, latency and throughput end‑to‑end, and instrument the network as a first‑class observability signal.

Compensation

• Staff: 185k-225k base
• Principal: 215k-270k base
• We offer performance bonuses and considerable equity.

AppGate is An Equal Opportunity/Affirmative Action Employer and a federal contractor subject to the Rehabilitation Act of 1973 and the Vietnam Era Veterans Readjustment Assistance Act of 1974 as amended, and their corresponding regulations. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status, age or any other federally protected class. Further, AppGate is an affirmative action employer committed to taking positive steps to employ, advance in employment and otherwise afford equal employment opportunity to protected veterans and individuals with disabilities. In furtherance of AppGate’s policy regarding affirmative action and equal employment opportunity, AppGate has developed a written affirmative action program. This program is available for review upon request by any applicant or employee during normal business hours by contacting the company’s EEO Coordinator.